Chaning the ROMS
Chaning the ROMS
First question,
Has anyone looked into chaning the rom located on the ecu? I've very annoyed by the emissions control BS that is on the 2005-2006 ecu's....... If you floor the car and let off of the pedal, the IAC will stay open and allow the car to maintain 14.7 af/r insted of going lean , i.e. the car drives it's self, very scary........ I'd like to get rid of this..... Any ideas?
Has anyone looked into chaning the rom located on the ecu? I've very annoyed by the emissions control BS that is on the 2005-2006 ecu's....... If you floor the car and let off of the pedal, the IAC will stay open and allow the car to maintain 14.7 af/r insted of going lean , i.e. the car drives it's self, very scary........ I'd like to get rid of this..... Any ideas?
No such thing as "Replacing the rom" however you can reflash your ECU... Very few ECU's are socketed nowadays so the eeprom swap is no longer something you'll hear much about.
What your describing is an adjustable parameter however, at least the ISCV (Idle Speed Control Valve) settings and others.. We have not found a "Decel fuel table" or closed loop fuel target value table yet though.. I have found once you get your fuel trims in check, and your ISCV settings where they need to be, residual pressure on deceleration will no longer result in the car wanting to continue to accelerate.. You can adjust your DV/BOV to open easier under engine vacuum which will also help.. Also the larger your BISS is open, the more residual pressure can force its way in there, hence hitting a target value with the ISCV is preferrable over the BISS, the BISS is used to get the lowest reasonable idle speed possible so the car doesn't stall should the ISCV get stuck completely closed.. which I think is about 650rpm stock...
What your describing is an adjustable parameter however, at least the ISCV (Idle Speed Control Valve) settings and others.. We have not found a "Decel fuel table" or closed loop fuel target value table yet though.. I have found once you get your fuel trims in check, and your ISCV settings where they need to be, residual pressure on deceleration will no longer result in the car wanting to continue to accelerate.. You can adjust your DV/BOV to open easier under engine vacuum which will also help.. Also the larger your BISS is open, the more residual pressure can force its way in there, hence hitting a target value with the ISCV is preferrable over the BISS, the BISS is used to get the lowest reasonable idle speed possible so the car doesn't stall should the ISCV get stuck completely closed.. which I think is about 650rpm stock...